RMTL 9 - Advanced composite restorations

Question 1

What is the Munsell colour system?

Answer 1

Hues - different colours
Chroma - change in concentration of colours
Value component - change in tone (light/dark)

Question 2

In the vita shade guide what is the colour system of A-D and 1-5?

Answer 2

A-D is the hue 
 - A = yellow
 - B = reddish yellow
 - C = grey 
 - D = reddish grey
1-5 is the chroma

Question 3

What is the polychromatic technique?

Answer 3

Increased number of shades of composite = more forgiving

Question 4

When should the shade of a tooth be taken when placing a restoration and why?

Answer 4

Take at START – as patient has their mouth open teeth dry out/ desiccate = look whiter than they are in reality

Question 5

What is Antimere?

Answer 5

Same tooth on opposite side

Question 6

What are hybrid composites and why would they be used?

Answer 6

• Filler particles are a mixture of large/ medium/ small

* Improved physico-mechanical properties

Question 7

Why are microfilm composites used, but what is there disadvantage?

Answer 7

Allows better ability to be polished and retain good polish

However weak, therefore don’t use in load bearing areas

Question 8

What must you do before jumping straight in to change OVD in a wear case?

Answer 8

Take a face bow record and get it mounted on a semi-adjustable articulator